Add codeql workflow (#190)

* Add codeql workflow

* Don't use AutoBuild

* Fix security issue recognised by codeql

* A better fix

.github/workflows/codeql.yml

@@ -0,0 +1,41 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  CODEQL_ENABLE_EXPERIMENTAL_FEATURES_SWIFT: true
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: macos-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'swift' ]
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+
+    - name: Build
+      run: swift build
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
+      with:
+        category: "/language:${{matrix.language}}"

Sources/HummingbirdFoundation/Files/FileMiddleware.swift

@@ -213,8 +213,9 @@ extension HBFileMiddleware {
     }
 
     private func matchRegex(_ string: String, expression: String) -> [Substring] {
+        let nsRange = NSRange(string.startIndex..<string.endIndex, in: string)
         guard let regularExpression = try? NSRegularExpression(pattern: expression, options: []),
-              let firstMatch = regularExpression.firstMatch(in: string, range: NSMakeRange(0, string.count))
+              let firstMatch = regularExpression.firstMatch(in: string, range: nsRange)
         else {
             return []
         }